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An Experimental Study on the ln Boiler Aerodynamic field of Horizontal Bias Air Combustion Pulverized Coal Burner

Zhu Tong, Ma Xichen, Xia Chunyi, et al (Harbin lnstitute of Technology)∥  
On a 125 MW boiler simulation test rig a comparison is conducted of the in boiler aerodynamic fields for a horizontal bias air combustion pulverized coal burner with different side secondary air velocities. The results have shown that when the ratio of the side secondary air dynamic head and the primary air dynamic head is between 1 2.4 there is little change in the in boiler aerodynamic field with the rotat ing gas flow tangential diameter being moderate and combustion gas filling fullness in good shape. With the sidesecondary air speed approaching that of the tertiary air there emerges a significant in crease in the rotating gas flow tangential diameter and an intense gas flow rotation with the gas flow clinging to the furnace wall. During hot state operation the boiler is liable to slagging and high temper ature corrosion. The present experimental study provides a basis for the use of the a bove mentioned burners.
【Fund】: 国家“九五”重点科技攻关资助
【CateGory Index】: TK223.23
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